Add private system extension API to get system update status

chrome/browser/extensions/extension_function_dispatcher.cc

Index: chrome/browser/extensions/extension_function_dispatcher.cc
diff --git a/chrome/browser/extensions/extension_function_dispatcher.cc b/chrome/browser/extensions/extension_function_dispatcher.cc
index 7ee1a19e0f092e1ef08354f1f849d13f3d8d10e5..f24168a088b5e99d46501baf4ecf7e8fc9ff2ba0 100644
--- a/chrome/browser/extensions/extension_function_dispatcher.cc
+++ b/chrome/browser/extensions/extension_function_dispatcher.cc
@@ -79,6 +79,7 @@
 #endif
 
 #if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/accessibility/accessibility_private_extension_api.h"
 #include "chrome/browser/extensions/extension_file_browser_private_api.h"
 #include "chrome/browser/extensions/extension_info_private_api_chromeos.h"
 #include "chrome/browser/extensions/extension_input_ime_api.h"
@@ -411,6 +412,9 @@ void FactoryRegistry::ResetFunctions() {
   // InputMethod
   RegisterFunction<GetInputMethodFunction>();
 
+  // Accessibility
+  RegisterFunction<chromeos::accessibility::GetUpdateStatusFunction>();
+
 #if defined(TOUCH_UI)
   // Input
   RegisterFunction<SendHandwritingStrokeFunction>();